| 1 | /* Generic stabs parsing for gas. |
| 2 | Copyright (C) 1989-2016 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GAS, the GNU Assembler. |
| 5 | |
| 6 | GAS is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as |
| 8 | published by the Free Software Foundation; either version 3, |
| 9 | or (at your option) any later version. |
| 10 | |
| 11 | GAS is distributed in the hope that it will be useful, but |
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| 14 | the GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GAS; see the file COPYING. If not, write to the Free |
| 18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 19 | 02110-1301, USA. */ |
| 20 | |
| 21 | #include "as.h" |
| 22 | #include "filenames.h" |
| 23 | #include "obstack.h" |
| 24 | #include "subsegs.h" |
| 25 | #include "ecoff.h" |
| 26 | |
| 27 | /* We need this, despite the apparent object format dependency, since |
| 28 | it defines stab types, which all object formats can use now. */ |
| 29 | |
| 30 | #include "aout/stab_gnu.h" |
| 31 | |
| 32 | /* Holds whether the assembler is generating stabs line debugging |
| 33 | information or not. Potentially used by md_cleanup function. */ |
| 34 | |
| 35 | int outputting_stabs_line_debug = 0; |
| 36 | |
| 37 | static void s_stab_generic (int, const char *, const char *); |
| 38 | static void generate_asm_file (int, const char *); |
| 39 | |
| 40 | /* Allow backends to override the names used for the stab sections. */ |
| 41 | #ifndef STAB_SECTION_NAME |
| 42 | #define STAB_SECTION_NAME ".stab" |
| 43 | #endif |
| 44 | |
| 45 | #ifndef STAB_STRING_SECTION_NAME |
| 46 | #define STAB_STRING_SECTION_NAME ".stabstr" |
| 47 | #endif |
| 48 | |
| 49 | /* Non-zero if we're in the middle of a .func function, in which case |
| 50 | stabs_generate_asm_lineno emits function relative line number stabs. |
| 51 | Otherwise it emits line number stabs with absolute addresses. Note that |
| 52 | both cases only apply to assembler code assembled with -gstabs. */ |
| 53 | static int in_dot_func_p; |
| 54 | |
| 55 | /* Label at start of current function if in_dot_func_p != 0. */ |
| 56 | static const char *current_function_label; |
| 57 | |
| 58 | /* |
| 59 | * Handle .stabX directives, which used to be open-coded. |
| 60 | * So much creeping featurism overloaded the semantics that we decided |
| 61 | * to put all .stabX thinking in one place. Here. |
| 62 | * |
| 63 | * We try to make any .stabX directive legal. Other people's AS will often |
| 64 | * do assembly-time consistency checks: eg assigning meaning to n_type bits |
| 65 | * and "protecting" you from setting them to certain values. (They also zero |
| 66 | * certain bits before emitting symbols. Tut tut.) |
| 67 | * |
| 68 | * If an expression is not absolute we either gripe or use the relocation |
| 69 | * information. Other people's assemblers silently forget information they |
| 70 | * don't need and invent information they need that you didn't supply. |
| 71 | */ |
| 72 | |
| 73 | /* |
| 74 | * Build a string dictionary entry for a .stabX symbol. |
| 75 | * The symbol is added to the .<secname>str section. |
| 76 | */ |
| 77 | |
| 78 | #ifndef SEPARATE_STAB_SECTIONS |
| 79 | #define SEPARATE_STAB_SECTIONS 0 |
| 80 | #endif |
| 81 | |
| 82 | unsigned int |
| 83 | get_stab_string_offset (const char *string, const char *stabstr_secname) |
| 84 | { |
| 85 | unsigned int length; |
| 86 | unsigned int retval; |
| 87 | segT save_seg; |
| 88 | subsegT save_subseg; |
| 89 | segT seg; |
| 90 | char *p; |
| 91 | |
| 92 | if (! SEPARATE_STAB_SECTIONS) |
| 93 | abort (); |
| 94 | |
| 95 | length = strlen (string); |
| 96 | |
| 97 | save_seg = now_seg; |
| 98 | save_subseg = now_subseg; |
| 99 | |
| 100 | /* Create the stab string section. */ |
| 101 | seg = subseg_new (stabstr_secname, 0); |
| 102 | |
| 103 | retval = seg_info (seg)->stabu.stab_string_size; |
| 104 | if (retval <= 0) |
| 105 | { |
| 106 | /* Make sure the first string is empty. */ |
| 107 | p = frag_more (1); |
| 108 | *p = 0; |
| 109 | retval = seg_info (seg)->stabu.stab_string_size = 1; |
| 110 | bfd_set_section_flags (stdoutput, seg, SEC_READONLY | SEC_DEBUGGING); |
| 111 | if (seg->name == stabstr_secname) |
| 112 | seg->name = xstrdup (stabstr_secname); |
| 113 | } |
| 114 | |
| 115 | if (length > 0) |
| 116 | { /* Ordinary case. */ |
| 117 | p = frag_more (length + 1); |
| 118 | strcpy (p, string); |
| 119 | |
| 120 | seg_info (seg)->stabu.stab_string_size += length + 1; |
| 121 | } |
| 122 | else |
| 123 | retval = 0; |
| 124 | |
| 125 | subseg_set (save_seg, save_subseg); |
| 126 | |
| 127 | return retval; |
| 128 | } |
| 129 | |
| 130 | #ifdef AOUT_STABS |
| 131 | #ifndef OBJ_PROCESS_STAB |
| 132 | #define OBJ_PROCESS_STAB(SEG,W,S,T,O,D) aout_process_stab(W,S,T,O,D) |
| 133 | #endif |
| 134 | |
| 135 | /* Here instead of obj-aout.c because other formats use it too. */ |
| 136 | void |
| 137 | aout_process_stab (what, string, type, other, desc) |
| 138 | int what; |
| 139 | const char *string; |
| 140 | int type, other, desc; |
| 141 | { |
| 142 | /* Put the stab information in the symbol table. */ |
| 143 | symbolS *symbol; |
| 144 | |
| 145 | /* Create the symbol now, but only insert it into the symbol chain |
| 146 | after any symbols mentioned in the value expression get into the |
| 147 | symbol chain. This is to avoid "continuation symbols" (where one |
| 148 | ends in "\" and the debug info is continued in the next .stabs |
| 149 | directive) from being separated by other random symbols. */ |
| 150 | symbol = symbol_create (string, undefined_section, 0, |
| 151 | &zero_address_frag); |
| 152 | if (what == 's' || what == 'n') |
| 153 | { |
| 154 | /* Pick up the value from the input line. */ |
| 155 | pseudo_set (symbol); |
| 156 | } |
| 157 | else |
| 158 | { |
| 159 | /* .stabd sets the name to NULL. Why? */ |
| 160 | S_SET_NAME (symbol, NULL); |
| 161 | symbol_set_frag (symbol, frag_now); |
| 162 | S_SET_VALUE (symbol, (valueT) frag_now_fix ()); |
| 163 | } |
| 164 | |
| 165 | symbol_append (symbol, symbol_lastP, &symbol_rootP, &symbol_lastP); |
| 166 | |
| 167 | symbol_get_bfdsym (symbol)->flags |= BSF_DEBUGGING; |
| 168 | |
| 169 | S_SET_TYPE (symbol, type); |
| 170 | S_SET_OTHER (symbol, other); |
| 171 | S_SET_DESC (symbol, desc); |
| 172 | } |
| 173 | #endif |
| 174 | |
| 175 | /* This can handle different kinds of stabs (s,n,d) and different |
| 176 | kinds of stab sections. */ |
| 177 | |
| 178 | static void |
| 179 | s_stab_generic (int what, |
| 180 | const char * stab_secname, |
| 181 | const char * stabstr_secname) |
| 182 | { |
| 183 | long longint; |
| 184 | const char *string; |
| 185 | char *saved_string_obstack_end; |
| 186 | int type; |
| 187 | int other; |
| 188 | int desc; |
| 189 | |
| 190 | /* The general format is: |
| 191 | .stabs "STRING",TYPE,OTHER,DESC,VALUE |
| 192 | .stabn TYPE,OTHER,DESC,VALUE |
| 193 | .stabd TYPE,OTHER,DESC |
| 194 | At this point input_line_pointer points after the pseudo-op and |
| 195 | any trailing whitespace. The argument what is one of 's', 'n' or |
| 196 | 'd' indicating which type of .stab this is. */ |
| 197 | |
| 198 | if (what != 's') |
| 199 | { |
| 200 | string = ""; |
| 201 | saved_string_obstack_end = 0; |
| 202 | } |
| 203 | else |
| 204 | { |
| 205 | int length; |
| 206 | |
| 207 | string = demand_copy_C_string (&length); |
| 208 | /* FIXME: We should probably find some other temporary storage |
| 209 | for string, rather than leaking memory if someone else |
| 210 | happens to use the notes obstack. */ |
| 211 | saved_string_obstack_end = notes.next_free; |
| 212 | SKIP_WHITESPACE (); |
| 213 | if (*input_line_pointer == ',') |
| 214 | input_line_pointer++; |
| 215 | else |
| 216 | { |
| 217 | as_warn (_(".stab%c: missing comma"), what); |
| 218 | ignore_rest_of_line (); |
| 219 | return; |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | if (get_absolute_expression_and_terminator (&longint) != ',') |
| 224 | { |
| 225 | as_warn (_(".stab%c: missing comma"), what); |
| 226 | ignore_rest_of_line (); |
| 227 | return; |
| 228 | } |
| 229 | type = longint; |
| 230 | |
| 231 | if (get_absolute_expression_and_terminator (&longint) != ',') |
| 232 | { |
| 233 | as_warn (_(".stab%c: missing comma"), what); |
| 234 | ignore_rest_of_line (); |
| 235 | return; |
| 236 | } |
| 237 | other = longint; |
| 238 | |
| 239 | desc = get_absolute_expression (); |
| 240 | |
| 241 | if ((desc > 0xffff) || (desc < -0x8000)) |
| 242 | /* This could happen for example with a source file with a huge |
| 243 | number of lines. The only cure is to use a different debug |
| 244 | format, probably DWARF. */ |
| 245 | as_warn (_(".stab%c: description field '%x' too big, try a different debug format"), |
| 246 | what, desc); |
| 247 | |
| 248 | if (what == 's' || what == 'n') |
| 249 | { |
| 250 | if (*input_line_pointer != ',') |
| 251 | { |
| 252 | as_warn (_(".stab%c: missing comma"), what); |
| 253 | ignore_rest_of_line (); |
| 254 | return; |
| 255 | } |
| 256 | input_line_pointer++; |
| 257 | SKIP_WHITESPACE (); |
| 258 | } |
| 259 | |
| 260 | #ifdef TC_PPC |
| 261 | #ifdef OBJ_ELF |
| 262 | /* Solaris on PowerPC has decided that .stabd can take 4 arguments, so if we were |
| 263 | given 4 arguments, make it a .stabn */ |
| 264 | else if (what == 'd') |
| 265 | { |
| 266 | char *save_location = input_line_pointer; |
| 267 | |
| 268 | SKIP_WHITESPACE (); |
| 269 | if (*input_line_pointer == ',') |
| 270 | { |
| 271 | input_line_pointer++; |
| 272 | what = 'n'; |
| 273 | } |
| 274 | else |
| 275 | input_line_pointer = save_location; |
| 276 | } |
| 277 | #endif /* OBJ_ELF */ |
| 278 | #endif /* TC_PPC */ |
| 279 | |
| 280 | #ifndef NO_LISTING |
| 281 | if (listing) |
| 282 | { |
| 283 | switch (type) |
| 284 | { |
| 285 | case N_SLINE: |
| 286 | listing_source_line ((unsigned int) desc); |
| 287 | break; |
| 288 | case N_SO: |
| 289 | case N_SOL: |
| 290 | listing_source_file (string); |
| 291 | break; |
| 292 | } |
| 293 | } |
| 294 | #endif /* ! NO_LISTING */ |
| 295 | |
| 296 | /* We have now gathered the type, other, and desc information. For |
| 297 | .stabs or .stabn, input_line_pointer is now pointing at the |
| 298 | value. */ |
| 299 | |
| 300 | if (SEPARATE_STAB_SECTIONS) |
| 301 | /* Output the stab information in a separate section. This is used |
| 302 | at least for COFF and ELF. */ |
| 303 | { |
| 304 | segT saved_seg = now_seg; |
| 305 | subsegT saved_subseg = now_subseg; |
| 306 | fragS *saved_frag = frag_now; |
| 307 | valueT dot; |
| 308 | segT seg; |
| 309 | unsigned int stroff; |
| 310 | char *p; |
| 311 | |
| 312 | static segT cached_sec; |
| 313 | static char *cached_secname; |
| 314 | |
| 315 | dot = frag_now_fix (); |
| 316 | |
| 317 | #ifdef md_flush_pending_output |
| 318 | md_flush_pending_output (); |
| 319 | #endif |
| 320 | |
| 321 | if (cached_secname && !strcmp (cached_secname, stab_secname)) |
| 322 | { |
| 323 | seg = cached_sec; |
| 324 | subseg_set (seg, 0); |
| 325 | } |
| 326 | else |
| 327 | { |
| 328 | seg = subseg_new (stab_secname, 0); |
| 329 | if (cached_secname) |
| 330 | free (cached_secname); |
| 331 | cached_secname = xstrdup (stab_secname); |
| 332 | cached_sec = seg; |
| 333 | } |
| 334 | |
| 335 | if (! seg_info (seg)->hadone) |
| 336 | { |
| 337 | bfd_set_section_flags (stdoutput, seg, |
| 338 | SEC_READONLY | SEC_RELOC | SEC_DEBUGGING); |
| 339 | #ifdef INIT_STAB_SECTION |
| 340 | INIT_STAB_SECTION (seg); |
| 341 | #endif |
| 342 | seg_info (seg)->hadone = 1; |
| 343 | } |
| 344 | |
| 345 | stroff = get_stab_string_offset (string, stabstr_secname); |
| 346 | if (what == 's') |
| 347 | { |
| 348 | /* Release the string, if nobody else has used the obstack. */ |
| 349 | if (saved_string_obstack_end == notes.next_free) |
| 350 | obstack_free (¬es, string); |
| 351 | } |
| 352 | |
| 353 | /* At least for now, stabs in a special stab section are always |
| 354 | output as 12 byte blocks of information. */ |
| 355 | p = frag_more (8); |
| 356 | md_number_to_chars (p, (valueT) stroff, 4); |
| 357 | md_number_to_chars (p + 4, (valueT) type, 1); |
| 358 | md_number_to_chars (p + 5, (valueT) other, 1); |
| 359 | md_number_to_chars (p + 6, (valueT) desc, 2); |
| 360 | |
| 361 | if (what == 's' || what == 'n') |
| 362 | { |
| 363 | /* Pick up the value from the input line. */ |
| 364 | cons (4); |
| 365 | input_line_pointer--; |
| 366 | } |
| 367 | else |
| 368 | { |
| 369 | symbolS *symbol; |
| 370 | expressionS exp; |
| 371 | |
| 372 | /* Arrange for a value representing the current location. */ |
| 373 | symbol = symbol_temp_new (saved_seg, dot, saved_frag); |
| 374 | |
| 375 | exp.X_op = O_symbol; |
| 376 | exp.X_add_symbol = symbol; |
| 377 | exp.X_add_number = 0; |
| 378 | |
| 379 | emit_expr (&exp, 4); |
| 380 | } |
| 381 | |
| 382 | #ifdef OBJ_PROCESS_STAB |
| 383 | OBJ_PROCESS_STAB (seg, what, string, type, other, desc); |
| 384 | #endif |
| 385 | |
| 386 | subseg_set (saved_seg, saved_subseg); |
| 387 | } |
| 388 | else |
| 389 | { |
| 390 | #ifdef OBJ_PROCESS_STAB |
| 391 | OBJ_PROCESS_STAB (0, what, string, type, other, desc); |
| 392 | #else |
| 393 | abort (); |
| 394 | #endif |
| 395 | } |
| 396 | |
| 397 | demand_empty_rest_of_line (); |
| 398 | } |
| 399 | |
| 400 | /* Regular stab directive. */ |
| 401 | |
| 402 | void |
| 403 | s_stab (int what) |
| 404 | { |
| 405 | s_stab_generic (what, STAB_SECTION_NAME, STAB_STRING_SECTION_NAME); |
| 406 | } |
| 407 | |
| 408 | /* "Extended stabs", used in Solaris only now. */ |
| 409 | |
| 410 | void |
| 411 | s_xstab (int what) |
| 412 | { |
| 413 | int length; |
| 414 | char *stab_secname, *stabstr_secname; |
| 415 | static char *saved_secname, *saved_strsecname; |
| 416 | |
| 417 | /* @@ MEMORY LEAK: This allocates a copy of the string, but in most |
| 418 | cases it will be the same string, so we could release the storage |
| 419 | back to the obstack it came from. */ |
| 420 | stab_secname = demand_copy_C_string (&length); |
| 421 | SKIP_WHITESPACE (); |
| 422 | if (*input_line_pointer == ',') |
| 423 | input_line_pointer++; |
| 424 | else |
| 425 | { |
| 426 | as_bad (_("comma missing in .xstabs")); |
| 427 | ignore_rest_of_line (); |
| 428 | return; |
| 429 | } |
| 430 | |
| 431 | /* To get the name of the stab string section, simply add "str" to |
| 432 | the stab section name. */ |
| 433 | if (saved_secname == 0 || strcmp (saved_secname, stab_secname)) |
| 434 | { |
| 435 | stabstr_secname = (char *) xmalloc (strlen (stab_secname) + 4); |
| 436 | strcpy (stabstr_secname, stab_secname); |
| 437 | strcat (stabstr_secname, "str"); |
| 438 | if (saved_secname) |
| 439 | { |
| 440 | free (saved_secname); |
| 441 | free (saved_strsecname); |
| 442 | } |
| 443 | saved_secname = stab_secname; |
| 444 | saved_strsecname = stabstr_secname; |
| 445 | } |
| 446 | s_stab_generic (what, saved_secname, saved_strsecname); |
| 447 | } |
| 448 | |
| 449 | #ifdef S_SET_DESC |
| 450 | |
| 451 | /* Frob invented at RMS' request. Set the n_desc of a symbol. */ |
| 452 | |
| 453 | void |
| 454 | s_desc (ignore) |
| 455 | int ignore ATTRIBUTE_UNUSED; |
| 456 | { |
| 457 | char *name; |
| 458 | char c; |
| 459 | char *p; |
| 460 | symbolS *symbolP; |
| 461 | int temp; |
| 462 | |
| 463 | c = get_symbol_name (&name); |
| 464 | p = input_line_pointer; |
| 465 | *p = c; |
| 466 | SKIP_WHITESPACE_AFTER_NAME (); |
| 467 | if (*input_line_pointer != ',') |
| 468 | { |
| 469 | *p = 0; |
| 470 | as_bad (_("expected comma after \"%s\""), name); |
| 471 | *p = c; |
| 472 | ignore_rest_of_line (); |
| 473 | } |
| 474 | else |
| 475 | { |
| 476 | input_line_pointer++; |
| 477 | temp = get_absolute_expression (); |
| 478 | *p = 0; |
| 479 | symbolP = symbol_find_or_make (name); |
| 480 | *p = c; |
| 481 | S_SET_DESC (symbolP, temp); |
| 482 | } |
| 483 | demand_empty_rest_of_line (); |
| 484 | } /* s_desc() */ |
| 485 | |
| 486 | #endif /* defined (S_SET_DESC) */ |
| 487 | |
| 488 | /* Generate stabs debugging information to denote the main source file. */ |
| 489 | |
| 490 | void |
| 491 | stabs_generate_asm_file (void) |
| 492 | { |
| 493 | const char *file; |
| 494 | unsigned int lineno; |
| 495 | |
| 496 | file = as_where (&lineno); |
| 497 | if (use_gnu_debug_info_extensions) |
| 498 | { |
| 499 | const char *dir; |
| 500 | char *dir2; |
| 501 | |
| 502 | dir = remap_debug_filename (getpwd ()); |
| 503 | dir2 = concat (dir, "/", NULL); |
| 504 | generate_asm_file (N_SO, dir2); |
| 505 | free (dir2); |
| 506 | xfree ((char *) dir); |
| 507 | } |
| 508 | generate_asm_file (N_SO, file); |
| 509 | } |
| 510 | |
| 511 | /* Generate stabs debugging information to denote the source file. |
| 512 | TYPE is one of N_SO, N_SOL. */ |
| 513 | |
| 514 | static void |
| 515 | generate_asm_file (int type, const char *file) |
| 516 | { |
| 517 | static char *last_file; |
| 518 | static int label_count; |
| 519 | char *hold; |
| 520 | char sym[30]; |
| 521 | char *buf; |
| 522 | const char *tmp = file; |
| 523 | const char *file_endp = file + strlen (file); |
| 524 | char *bufp; |
| 525 | |
| 526 | if (last_file != NULL |
| 527 | && filename_cmp (last_file, file) == 0) |
| 528 | return; |
| 529 | |
| 530 | /* Rather than try to do this in some efficient fashion, we just |
| 531 | generate a string and then parse it again. That lets us use the |
| 532 | existing stabs hook, which expect to see a string, rather than |
| 533 | inventing new ones. */ |
| 534 | hold = input_line_pointer; |
| 535 | |
| 536 | sprintf (sym, "%sF%d", FAKE_LABEL_NAME, label_count); |
| 537 | ++label_count; |
| 538 | |
| 539 | /* Allocate enough space for the file name (possibly extended with |
| 540 | doubled up backslashes), the symbol name, and the other characters |
| 541 | that make up a stabs file directive. */ |
| 542 | bufp = buf = (char *) xmalloc (2 * strlen (file) + strlen (sym) + 12); |
| 543 | |
| 544 | *bufp++ = '"'; |
| 545 | |
| 546 | while (tmp < file_endp) |
| 547 | { |
| 548 | char *bslash = strchr (tmp, '\\'); |
| 549 | size_t len = (bslash) ? (size_t) (bslash - tmp + 1) : strlen (tmp); |
| 550 | |
| 551 | /* Double all backslashes, since demand_copy_C_string (used by |
| 552 | s_stab to extract the part in quotes) will try to replace them as |
| 553 | escape sequences. backslash may appear in a filespec. */ |
| 554 | strncpy (bufp, tmp, len); |
| 555 | |
| 556 | tmp += len; |
| 557 | bufp += len; |
| 558 | |
| 559 | if (bslash != NULL) |
| 560 | *bufp++ = '\\'; |
| 561 | } |
| 562 | |
| 563 | sprintf (bufp, "\",%d,0,0,%s\n", type, sym); |
| 564 | |
| 565 | input_line_pointer = buf; |
| 566 | s_stab ('s'); |
| 567 | colon (sym); |
| 568 | |
| 569 | if (last_file != NULL) |
| 570 | free (last_file); |
| 571 | last_file = xstrdup (file); |
| 572 | |
| 573 | free (buf); |
| 574 | |
| 575 | input_line_pointer = hold; |
| 576 | } |
| 577 | |
| 578 | /* Generate stabs debugging information for the current line. This is |
| 579 | used to produce debugging information for an assembler file. */ |
| 580 | |
| 581 | void |
| 582 | stabs_generate_asm_lineno (void) |
| 583 | { |
| 584 | static int label_count; |
| 585 | char *hold; |
| 586 | const char *file; |
| 587 | unsigned int lineno; |
| 588 | char *buf; |
| 589 | char sym[30]; |
| 590 | /* Remember the last file/line and avoid duplicates. */ |
| 591 | static unsigned int prev_lineno = -1; |
| 592 | static char *prev_file = NULL; |
| 593 | |
| 594 | /* Rather than try to do this in some efficient fashion, we just |
| 595 | generate a string and then parse it again. That lets us use the |
| 596 | existing stabs hook, which expect to see a string, rather than |
| 597 | inventing new ones. */ |
| 598 | |
| 599 | hold = input_line_pointer; |
| 600 | |
| 601 | file = as_where (&lineno); |
| 602 | |
| 603 | /* Don't emit sequences of stabs for the same line. */ |
| 604 | if (prev_file == NULL) |
| 605 | { |
| 606 | /* First time thru. */ |
| 607 | prev_file = xstrdup (file); |
| 608 | prev_lineno = lineno; |
| 609 | } |
| 610 | else if (lineno == prev_lineno |
| 611 | && filename_cmp (file, prev_file) == 0) |
| 612 | { |
| 613 | /* Same file/line as last time. */ |
| 614 | return; |
| 615 | } |
| 616 | else |
| 617 | { |
| 618 | /* Remember file/line for next time. */ |
| 619 | prev_lineno = lineno; |
| 620 | if (filename_cmp (file, prev_file) != 0) |
| 621 | { |
| 622 | free (prev_file); |
| 623 | prev_file = xstrdup (file); |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | /* Let the world know that we are in the middle of generating a |
| 628 | piece of stabs line debugging information. */ |
| 629 | outputting_stabs_line_debug = 1; |
| 630 | |
| 631 | generate_asm_file (N_SOL, file); |
| 632 | |
| 633 | sprintf (sym, "%sL%d", FAKE_LABEL_NAME, label_count); |
| 634 | ++label_count; |
| 635 | |
| 636 | if (in_dot_func_p) |
| 637 | { |
| 638 | buf = (char *) xmalloc (100 + strlen (current_function_label)); |
| 639 | sprintf (buf, "%d,0,%d,%s-%s\n", N_SLINE, lineno, |
| 640 | sym, current_function_label); |
| 641 | } |
| 642 | else |
| 643 | { |
| 644 | buf = (char *) xmalloc (100); |
| 645 | sprintf (buf, "%d,0,%d,%s\n", N_SLINE, lineno, sym); |
| 646 | } |
| 647 | input_line_pointer = buf; |
| 648 | s_stab ('n'); |
| 649 | colon (sym); |
| 650 | |
| 651 | input_line_pointer = hold; |
| 652 | outputting_stabs_line_debug = 0; |
| 653 | free (buf); |
| 654 | } |
| 655 | |
| 656 | /* Emit a function stab. |
| 657 | All assembler functions are assumed to have return type `void'. */ |
| 658 | |
| 659 | void |
| 660 | stabs_generate_asm_func (const char *funcname, const char *startlabname) |
| 661 | { |
| 662 | static int void_emitted_p; |
| 663 | char *hold = input_line_pointer; |
| 664 | char *buf; |
| 665 | unsigned int lineno; |
| 666 | |
| 667 | if (! void_emitted_p) |
| 668 | { |
| 669 | input_line_pointer = "\"void:t1=1\",128,0,0,0"; |
| 670 | s_stab ('s'); |
| 671 | void_emitted_p = 1; |
| 672 | } |
| 673 | |
| 674 | as_where (&lineno); |
| 675 | if (asprintf (&buf, "\"%s:F1\",%d,0,%d,%s", |
| 676 | funcname, N_FUN, lineno + 1, startlabname) == -1) |
| 677 | as_fatal ("%s", xstrerror (errno)); |
| 678 | input_line_pointer = buf; |
| 679 | s_stab ('s'); |
| 680 | free (buf); |
| 681 | |
| 682 | input_line_pointer = hold; |
| 683 | current_function_label = xstrdup (startlabname); |
| 684 | in_dot_func_p = 1; |
| 685 | } |
| 686 | |
| 687 | /* Emit a stab to record the end of a function. */ |
| 688 | |
| 689 | void |
| 690 | stabs_generate_asm_endfunc (const char *funcname ATTRIBUTE_UNUSED, |
| 691 | const char *startlabname) |
| 692 | { |
| 693 | static int label_count; |
| 694 | char *hold = input_line_pointer; |
| 695 | char *buf; |
| 696 | char sym[30]; |
| 697 | |
| 698 | sprintf (sym, "%sendfunc%d", FAKE_LABEL_NAME, label_count); |
| 699 | ++label_count; |
| 700 | colon (sym); |
| 701 | |
| 702 | if (asprintf (&buf, "\"\",%d,0,0,%s-%s", N_FUN, sym, startlabname) == -1) |
| 703 | as_fatal ("%s", xstrerror (errno)); |
| 704 | input_line_pointer = buf; |
| 705 | s_stab ('s'); |
| 706 | free (buf); |
| 707 | |
| 708 | input_line_pointer = hold; |
| 709 | in_dot_func_p = 0; |
| 710 | current_function_label = NULL; |
| 711 | } |